| Title | The combined application of nitrogen and biochar reduced microbial carbon limitation in irrigated soils of West African urban horticulture |
| Publication Type | Journal Article |
| Year of Publication | 2022 |
| Authors | Fritz A.L, Jannoura R., Beuschel R., Steiner C., Buerkert A., Joergensen R.G |
| Journal | Chemical and Biological Technologies in Agriculture |
| Volume | 9 |
| Pagination | 12 |
| Date Published | Jul |
| Type of Article | Article |
| Accession Number | WOS:000826150700001 |
| Keywords | acidification, Agriculture, bacterial, biomass, communities, functional diversity, Fungal, IMPACT, long-term fertilization, microbial biomass, microorganisms, organic-matter, Vegetable production, WASTE-WATER, Wastewater irrigation |
| Abstract | Background: Intensive wastewater irrigated urban horticulture in sub-Saharan West Africa receives high nutrient inputs, which lead to large gaseous and leaching losses. The addition of biochar to the usually sandy soils may reduce these losses and improve the habitat conditions for soil microorganisms. Two similar experiments focused on crop yields and nutrient balances have been carried out over a 2-year period in semi-arid Ouagadougou, Burkina Faso, and in sub-humid Tamale, Ghana, representing to some extent different but typical locations in West Africa. Methods: Biochar and N fertilization effects were measured on soil microbial biomass carbon (MBC), fungal ergosterol, and functional diversity, estimated by multi-substrate-induced respiration. It was additionally possible to study the effects of clean water irrigation on the respective microbial properties in Tamale soil. Results: Sole biochar addition did not affect any soil chemical or soil biological properties analyzed. In contrast, biochar application with N fertilization increased the mean respiratory response of the 11 substrates added by 23% in the Ouagadougou soil and by 13% in the Tamale soil. N fertilization decreased soil pH in both cities by 1.1 units. However, a pH-H2O of 4.7 led to reduced MBC and ergosterol contents at Tamale. Also, the Shannon index of the respiratory response was positively correlated with the soil pH. Clean water irrigation decreased the ergosterol content and increased the respiratory response to organic acids. Conclusions: Biochar addition with N fertilization improved habitat conditions for soil microorganisms. An N fertilizer-induced decline in soil pH
|
| Alternate Journal | Chem. Biol. Technol. Agric. |
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Fritz, Anne-Louise Jannoura, Ramia Beuschel, Rene Steiner, Christoph Buerkert, Andreas Joergensen, Rainer Georg
German Ministry of Education and Research (BMBF) [FKZ 031A242A]; Projekt DEAL
Open Access funding enabled and organized by Projekt DEAL. The field work of this study was funded by the German Ministry of Education and Research (BMBF) within the framework of the -UrbanFoodPlus project (www.urbanfoodp lus.org) as part of the GlobE initiative (BMBF, FKZ 031A242A).
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Springer
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2196-5641
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Joergensen, RG (corresponding author), Univ Kassel, Soil Biol & Plant Nutr, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany.
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